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process of aluminum foam was investigated. The effects of the foaming agent content and foaming temperature on the porosity of aluminum foam were also discussed. The experimental results show that the novel foaming agent has a wide decomposition temperature range and a slow decomposed rate; the extra viscosifier such as Ca is unnecessary while using this foaming agent; the porosity firstly increases......
Diagenesis and porosity evolution of Permian reservoir in Wu-Xia Area, Junggar Basin NIU Hai-qing1, CHEN Shi-yue1, ZHANG Peng2, YAN Ji-hua1 (1. Faculty of Geo-Resources and Information, China... mainly undergoes compaction, cementation, dissolution and fracturing processes. The porosity evolution of reservoir is closely related with the diagenesis types. Mechanical compaction and chemical......
and high temperature were studied, respectively. The results show that porosity reduces with increasing the milling time, the powders dispersion property is worse without milling and fine powder is easy... close pore by sintering at low temperature. Key words: TiAl alloy; porous material; mechanical milling; sintering; porosity 金属多孔材料是20世纪80年代后期国际上迅速发展起来的,由刚性骨架和内部的孔洞组成,是具有优异的物理特性和良好的力学性能的新型工程材料.金属多孔材料具备的优......
Porosity and mechanical properties of porous titanium fabricated by gelcastingLI Yan GUO Zhimeng HAO Junjie REN Shubin School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China摘 要:<正>Porous Ti compacts with large size and complex shape for biomedical applications were fabricated in the porosity......
becomes homogeneous gradually with increasing the hydrogen gas pressure and withdraw rate. The porosity decreases with increasing the hydrogen gas pressure, while it is independent of the withdraw rate... to the decrease of the average pore diameter and the increase of the pore number density. Key words: porous material; lotus-type porous Cu; continuous casting Gasar process; porosity Gasar工艺是一种利用金属-气体共晶定向凝固......
printing is close to the theoretical density of alloy. The porosity of 80Ni20Cr alloy fabricated by laser 3D printing technology using layer-layer orthogonal route is lower than that of layer-layer...; porosity Foundation item: Projects(11372100, 51562027) supported by the National Natural Science Foundation of China; Project(YC2015-S311) supported by Jiangxi Province Graduate Innovation Fund, China......
such as density, porosity, hardness and tensile strength. The results were compared with basic matrix alloy. Furthermore, the OM, SEM with EDAX and XRD analyses were carried out to analyze the dispersion... particles were well bonded with matrix alloy with clear interface. It was also found that the density decreased with increase in mass fraction of BLA particles and porosity increased with increase......
Influence of Absolute Basicity and Capillary Porosity on Carbonation of Concrete巴明芳摘 要:The single influence of capillary porosity and coupling effects of absolute basicity and capillary porosity on concrete carbonation were investigated. The experimental results showed that carbonation rate of concrete at a given absolute basicity (AB) increased......
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